Security readout for executives and security teams
Plain-English summary
Affected Reyrolle 7SR5 devices may reveal enough web-interface information for an unauthenticated attacker to predict session identifiers, bypass login controls, and access the device. Successful compromise could expose information, permit unauthorized changes, or disrupt operation. The supplied CVSS score is 9.8, making this a critical remediation priority.
Executive priority
Treat as an urgent, critical issue. Identify reachable devices immediately, isolate exposed management interfaces, and schedule controlled upgrades. Prioritize systems accessible from the internet or less-trusted networks. Coordinate remediation with operational owners because changes to these devices may require availability and safety planning.
Technical view
CVE-2026-62645 affects all Reyrolle 7SR5 versions earlier than V2.70. Web-interface information can be used to calculate current and previous session IDs, enabling network-based authentication bypass without privileges or user interaction. The record assigns CVSS 3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H and categorizes the weakness as CWE-306.
Likely exposure
Exposure is highest where an affected device's web interface is reachable from untrusted, compromised, or broadly accessible networks. The bundle does not identify default interface exposure, deployment prevalence, or required network ports. Devices below V2.70 should therefore be inventoried and their actual web-interface reachability verified.
Exploitation context
The supplied sources describe a low-complexity, unauthenticated, network-accessible authentication bypass. They do not provide evidence of active exploitation, and the CVE is not marked as present in the supplied KEV data. Absence from KEV does not establish that exploitation has never occurred.
Researcher notes
The core condition is session-ID predictability derived from information exposed by the web interface. The bundle does not specify the disclosed fields, session-generation algorithm, ports, logging indicators, or whether sessions remain valid after logout. Researchers should validate only in authorized environments and consult the Siemens advisory for product-specific details.
Mitigation direction
- Upgrade affected Reyrolle 7SR5 devices to V2.70 or later, following Siemens guidance and operational change controls.
- Restrict web-interface access to authorized management networks and trusted administrative hosts.
- Prevent direct internet or untrusted-network access to the device web interface.
- Monitor Siemens advisory SSA-142885 for additional mitigations, prerequisites, or revised firmware guidance.
Validation and detection
- Inventory Reyrolle 7SR5 devices and record each installed firmware version.
- Confirm no inventoried device remains below V2.70 after remediation.
- Verify web interfaces are unreachable from internet-facing, user, and other untrusted network segments.
- Review device and network logs for unexplained sessions or unauthorized configuration changes.
- Confirm upgrade success and expected operation through approved functional testing.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-62645 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9siemensCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——siemensVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://cert-portal.siemens.com/productcert/html/ssa-142885.htmlCVE reference, siemens
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.